Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Winchester Physician Associates

Gynecologic Oncology Physician in Winchester, MA · enumerated 2013 · authorized official Eileen Wills, Billing Manager.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1336577097

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Registry record

Entity type Organization (Type 2)

Legal business name Winchester Physician Associates

Other name <Unavail>

Parent organization Winchester Physician Associates

Practice address 620 Washington St, Winchester, MA, 01890

Phone (781) 756-5000

Fax (781) 756-8380

Enumeration date Oct 16, 2013

Last updated in NPPES Oct 16, 2013

Taxonomy & classification

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Secondary

207VX0201X Gynecologic Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Eileen Wills

Title Billing Manager

Phone (781) 756-7273

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What type of organization is Winchester Physician Associates?

Winchester Physician Associates is registered in NPPES as a Gynecologic Oncology Physician (its primary provider taxonomy).

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-10-16.